To fix a screwbolt into concrete

Tooling

Use hammer drill & SDS drill bit for concrete, for brick and block work use rotary percussion.

Drill bit diameter :- ensure correct diameter is selected for the fixing to be used and is not worn below minimum tolerance.

NB. when drilling into dense concrete observe the maximum efficient working life of the drill bit.

Preparation

Hole depth must be 2 times diameter plus the full working length of the bolt, to allow for the dust created when the bolt is installed into the pre-drilled hole.

Remove surplus dust from the drilled hole by easing the drill bit up and down within the hole and blowing clear.

Installation

To install the screwbolt use a branded ratchet spanner with a full hexagon socket, or impact wrench. We recommend the use of the Bosch GDS 18E (up to 16mm bolts) or Bosch GDS 30 (20-24mm bolts) or similar. To ensure that you do not ream out the drilled hole set the impact wrench to slow start.

This will also avoid any excessive torque stress being applied to the bolt.

Apply pressure to head of bolt to ensure engagement of first thread.

If resistance is encountered when screwing down the bolt, simply unscrew one turn to release trapped dust, and then continue to tighten down. The bolt is set when the built in washer, at the underside of the head of the bolt, meets the face of the object being fixed to the substrate.

No further tightening of the fixing is necessary.

Fixing details for the Excalibur Screwbolt

Substrate

Concrete

Brick

Soft Brick & Block

Hole Depth

Drilling Tool

Hammer

Rotary Impact

Rotary Only

Drill Bit

SDS

SDS/Masonry

Masonry

E+2 x DIA

Diameter

Drill Dia (mm)

6mm

6

6

5.5

E + 12mm

8mm

8

8

7

E + 16mm

10mm

10

10

9

E + 20mm

12mm

12

12

11

E + 24mm

16mm

16

*

*

E + 32mm

20mm

20

*

*

E + 40mm

24mm

24

*

*

E + 48mm

Embedment (E) * not recommended

MAXIMUM TORQUE LOADS NOT TO BE EXCEEDED WHEN USING
IMPACT WRENCHES TO INSTALL THE EXCALIBUR PRODUCT RANGE:

RECOMMENDED IMPACT WRENCHES (OR EQUIVALENT)
Into Concrete only use

Bolt size 6mm - 16mm

Bolt size 20mm - 24mm

BOSCH GDS 18E

BOSCH GDS 30

Torque 70Nm - 250Nm

Torque 250Nm - 1000Nm

Extensive testing when using the tools listed within the torque
parameters shown into varying grades of concrete and
complying with our published setting instructions will ensure our
products are safe for use in critical load situations.